Keyhole guard and lock



W. S. MONTGOMERY.

KEY HOLE GUARD AND LOCK. APPLICATION FILED APR. 19. 1920.

1,359, 1 90. Patented Nov. 16, 920.

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UNITED STATES PATENT OFFICE.

WILLIAM S. MONTGOMERY, OF DETROIT, MICHIGAN.

- KEYHOLE GUARD AND LooK.

To all whom it may concern:

Be it known that I, \VILLIAM S. MONT- GOMERY, citizen of the United States, resid in at Detroit, in the county of Wayne and tate of Michigan, have invented certain new and useful Improvements in Keyhole Guards and Locks, of which the following is a specification.

The present invention relates to improvements in key-hole guards and locks and as its main object, a combined key-hole and lock that may be positioned in the key-hole without removing the key from the lock and which, when in position will prevent the key from being dislodged from the outside,

or if there is no key in the lock, prevent the insertion of a key from either the inside or the outside of the look.

A further object of the invention is to provide a device of the above character which is simple in construction, cheap to manufacture and which may be quickly attached or detached to or from the lock in connection with which it is used.

Various other objects and advantages of my invention will become apparent during the continuance of the following description.

In the drawings:

Figure 1 is a view in cross section of 'a conventional door and lock showing my invention in place in connection therewith.

Fig. 2 is a view in perspective of the looking tongue of the device which is inserted in the hole.

Fig. 3 is a view in detail of the securing hasp.

In the drawings, I have shown for the purpose of illustration, a door 10 equipped with a conventional lock 11 which has the ordinary key-hole 12. A key 13 is also shown in the lock and the head thereof is slightly out of alinement with the key-hole, the key having been given a partial turn after being inserted in the lock.

My invention, more properly consists of a locking tongue 14 being slightly bent intermediate its ends as at 15 and having its bent end tapered to a point as shown at 16. At its other end the tongue is bent to form a head 17 which lies at right angles to the body of the tongue as clearly shown in Fig. 2. The upper edge of the body of the tongue is cut away to provide a recess 18. Likewise the lower edge of the body of the tongue is cut away as at 19 to form a shoul- Specification of Letters Patent. Pate t d NO 16 1920 Application filed April 19, 1920. Serial No. 375,003. r

der 2 0 When the body of the tongue is, in place in the key-hole the bent end 16 terminates slightly to one side of the key-hole so that an lnstrument inserted in the key-hole from the outside cannot be manipulated to dislodge the same and the shoulder 20 abuts the rear wall of the lock as clearly shown in Fig. 1 so as to prevent the withdrawal of the tongue without first raising the same slightly.

I also provide a securing. hasp 21. The hasp is provided with a longitudinal slot or channel 22 which receives the body of the tongue as shown in Fig. 1 and is provided with a lug 23 which lies in the cut-out 18 of the body of the tongue also shown in Fig. 1.

-From the above it will be observed that when the parts are in the position shown in Flg. l and the lower end of the hasp 21 is locked 1n position it will be impossible to remove the body of the tongue 14 from the key-hole without first releasing the hasp 21. In order to firmly secure the hasp in positlon and thereby indirectly hold the tongue 14; n place, I equip the door 10 with a fastenlng member 23. The fastening member is providedwith a head 24 so that when the head 24; is in an upright position the hasp can be readily slipped thereover, the shank of the fastening member extending through the opening 22. The head of the fastening member is then turned downwardly as shown in Fig. 1 and thereby locking the hasp in place.

The tongue 14: as well as the hasp 21 may be made any suitable size so that it can be used in connection with different sized locks and may be made of different kinds of material, as is satisfactory.

From the foregoing it is believed that the advantages and novel features of my invention can be readily understood and therefore further detailed description is deemed unnecessary.

What is claimed is:

1. In a key hole guard and look, a locking tongue having one end offset with respect to the body thereof and adapted to be inserted in the key hole of the lock the offset end thereof being out of alinement with the key hole, a head formed at the other end of said tongue, a hasp having a slot receiving the body of said tongue,.and means to lock said hasp in position.

2. In a key-hole guard and lock, the combination with a door and lock, of a locking 3. In a key hole guard and look, a locking tongue adapted to be inserted in the key hole of the lock, one end of said tongue being offset to lie out of alinement with the key hole, a head formed at the other end of said lock, said tongue being cut away along its iov-ier edge to form a shoulder, said shoulder projecting below the key hole opening of the look, said tongue being also cut away along its upper edge, a hasp havinga longitudinal slot receiving the body of said tongue, 3 lug on said hasp fitting said. last named cut away portion, and means to secure said hasp in place.

In testimony whereof I aflix my signature.

WILLIAM S, MONTGOMERY. 

